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Drilling EngineeringWell ControlCalculation record

Bullheading Initial Hydrostatic Pressure from Formation Pressure Calculator

Ph,init=Pform−SITPP_{h,init}=P_{form}-SITP

Enter the declared drilling engineering inputs below to solve P_h_init. Variable definitions, units, the default calculation, and the available source trail are included on this page.

Tabular solver

Inputs

Defaults provide a quick field-unit example for the equation.

2 variables

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Extended guidance in preparation

What is available in this record

This record provides the functioning calculator, formula, declared variables and units, a reproducible default result, and the available citation metadata. A separately written engineering interpretation has not yet been published for this calculation.

Formula reference

Formula, variables, and default calculation

Ph,init=Pform−SITPP_{h,init}=P_{form}-SITP

Reproducible default result

With the default values shown below, the calculation returns P_h_init = 3,800 psi. Defaults demonstrate the implementation; they are not recommended field values.

P_formpsi

5000

SITPpsi

1200

Input definitions

P_form

psi

Formation Pressure

SITP

psi

Shut-In Tubing Pressure

Output definitions

P_h_init

psi

Initial Hydrostatic Pressure

P_form

psi

Formation Pressure

SITP

psi

Shut-In Tubing Pressure

Source and record status

Source metadata identifies the relationship implemented by the calculator. Check the cited edition, unit basis, and scope against the engineering case before operational use.

reviewed

IADC WellSharp Formula Sheet, field units, well completion/workover bullheading formulae.

Open source reference